Thanks for your response.

However, i found that since my configuration is somewhat matching with the attached EJMA configuration I checked with including the 2 pairs of hinge expansion joint to get rid of pressure thrust & slotted hinge gaps etc.

Whats your/other experts experience say using 1 hinge joints pair for regenerated catalyst standpipe & riser & 2nd hinge joint pair on spent catalyst stand pipe with Jbend connected to regenerator.